Valve turning and grinding machine



' F. C. WILLIAMS. VALVE TURNING AND GRINDING-IVIACHINE.

APPLICATION FILED IuLY I. I92o.

IIAIMU., Patented May 23, w22..

LIIII I ling!!! FREDERKC TILLAMS, 0l? CORONLADQ BEACH, CALIFORNIA.

"VLVE TURNXNG- AND @BINDING MAGHNE.

Application filed July 1, 1,920. `Serial No. 383,40621.

Be it known that l, Fnnnsnic C. lll/Uf Liens, a citizen ot the United States, and a resident of Coronado Beach, in the county of dan Diego and titate of California, have invented certain new and useful improvements in Valve Turning and Grinding` Machines, of which the iollowinp,` is a specification.

li/l-yl invention relates to means for turn ingand grinding valves such as are used in internal combustion engines and the like and` the primary obj ect thereof is to provide a machine which will readily `and easily ac complish this purpose with the greatest pre cision. Y i

Valves of this class are usually` finished and refinished in lathes and in order that the angle of the valve may perfectly `correspond to and t into the valve seata great amount of time is consumed in setting up the machines, and the same is true when the valves are ground. Not every shop is equipped with the necessary machine tools for renishing the valves, and a further object of this invention is to provide a small machine ol simple structure which may be provided at a moderate price tor small shops `for accurately forming and finishing; the

valves. l

The angleof the valves at the `valve seat is usually about t5 degrees, and in order toA provide against leakage at the valve, and thus arford Athe maximum efficiency or the i engine, it is necessary to have 'the valve objects will exactly correspond to the valve seat in dimensions anditorm, and to provide against inaccuracy in setting1 up thevalve for inishing, l provide means for holding the valve firmly in position in the machine and means for holding' the tool in adjustable working relation with the valve, `the tool being supportediat the properv angle relative to the valve supporting spindle, `thus providing means. for quickly finishing" the work and fendering7 it possibleto finish or reiinish a large number or valves in a short length oit` time.

A further object is to'provide the` toolv holder or the machine with means whereby ,i the turning tool may be quickly replaced with a grinding element capable or being-` driven by power, withoutdisturbing; the rel `ative positions in the machine of the tool holder and valve.supportingmeans. @ther presses.,

. 2 and 3 .adjusting "mer-1t.

ward thereon.` and holding it Vtion during?,- eration.

appear as the description proi Referring to the drawings, in which similar charactersfot reference indicate the'samc parts throughout the specilications and the vseveral views or the drawings, Fig. Il. is a lward of the body; his: 7 is a sectional plan of a modified forni of tool holder, showing the grinding; means supported therein; Fig. 8 is a transverse section of Fig. 7 on the line -iand F 9 is a longitudinal section of the` same.

Thetlat ibase l` has a pair olf main bearings l supported thereon by .means of ribs 4t and 5, to Awhich are attached at the top the top removable bearing members 2 and 3, respectively, by means of studs 6 and wing nuts 7, each. of the bearings havingv a hushing 8 which is tightly held between the upper and lower bearingV` members when the nuts 7 are-tightened on the studs 6.

A valve spindle `9 is revolubly supported in the bushings 8 of the bearings 2 and 3 andis provided at the rear end with a crank l0 held thereon `by means of a screw or bolt ll secured to thelugs l2 on the crank, or 'The forward end of the `Spindle 1s` substantially` extended rorwaiid of the bearing@ and has a conical bore 13 in the end to receive the conical end or the pivot y screw ltwhich` is threaded through the boss l5 at the front end of the `base supported on ribs 16 and 17, a lock nut l@ being provided `on the screw-14 for lock- Y,

ing` the screw against longitudinal move- The angle .of the pivot seat in the end of the4 spindle 9 conforms substantially to that of the end of the. screw .la and a minimum amount or 'friction will be encountered in the turning ofthe spindle yo-arbor 9 by `means or a slight taper on the end of the spindle, or, by other means, a collar 20 being (placed on the spindle at the rear of the valve between which and the front side of the bearing V3 a spring 21 compressibly held on the spindle for forcing the valve forin such posithe turning and grindingopra horizontal extension 22, forming a tool holder is` integral with and is connected with the base 1 by means of ribs 23 and 24. This extension is disposed at an angle of degrees, or any suitable angle, relative to the longitudinal axis of the spindle 9 and has a cover plate 25 removably held thereon by means of screws 26. A square or rectangular groove 27 is formed in the upper portion of the extension 22 and extends the entire length thereof. the upper side of the groove being covered by the plate 25 and a longitudinally movable tool holder 28 being held therein.

The lower portion of the extension is bored and threaded as at29, to receive the tool operating screw 30 for moving the tool holder 28 backward and forward in the eX tension 22, the outer end of the screw 8O having a iiange 81 formed thereon, as shown in Figs.' 1 and 6, which engages a transverse groove 82 formed in the lower side of the tool holder 28. Thus when the hand wheel 38, which is carried on the outer end of the screw, is turned, the screw is moved either baekwardly or forwardly of the extension 22, depending upon the direction of movement of the wheel, and the tool holder 28 is moved thereby, by reason of the connections described.V The inner end of the tool holder 28`has a transverse bore for receiving and holding` the cutting` tool 34 which is im inovably held in the holder by means of a suitable set screw 35, as shown in Fig. 1. The elevation of the tool holder` 28 is such that the cutting edge of the tool 84 will be in the plane of the horizontal center line of the spindle 9 and valve 19.

Y It it obvious that when the spindle 9 is turned by means of the crank 10 for rotating the valve 19, and the proper position of the valve 19 on the spindle has been adjusted by means of the screw 14, the tool 84 may be set forward in the holder 28 so that the cutting edge thereof is in proper position for cutting,

and the tool holder may be moved in the eX- tension 22 by turning the hand wheel thus movingI the tool backward-and forward,l over'the edge of the valve,

The valve 19 may be ground by means of tne mechanism shown in Figs. 7, 8 and 9, after vrst removing the screw 3() and the hand wheel carried thereby Vfrom the extension 22.

vln'such case, the tool holder 28 may be provided with a longitudinal bore 36 to revolubly receive a shaft 37 which carries at its out-erv end a grooved pulley 38 and at its in- `ner end an emery wheel 39, the latter being held on the shaft in the usual manner by means of the collar plate 40 and nut 41. A

` rack 42 maybe formed on the lower side of the tool holder 28 and a suitable groove 43 ,"r'nay be formed in the extension 22'to receive vthe rack. A pinion 44, carried by' a shaft 45 having a bearing in the front side of the Y extension 22, is suitably mounted in a trans- Verse bore 46 in the lower portion of the extension so that the teeth thereon will mesh with those of the rack 42, and a cap 48, serving as an additional bearing for the op posite end of the shaft 45, is secured to the rear side of the extension by means of screws 49. A hand wheell 50, similar to the one 33 on the other forni of device previously de scribed. is provided on the outer end oi the shaft 45 for turning the pinion 44.

`When the hand wheel 50 is turned, and the pulley 88 is suitably connected for operation by means of a belt leading to the lathe or other source of power for operating the grinding wheel 39, the pinion 44 is rotatei'l. thus moving the rack 42 and tool holder 28 backward or forward, as the case may be. and the grinding wheel is moved over the surface of the valve, as illustrated in Fig. T.

During the operation of the grinding wheel, it is of course necessary to turn the spindle 9 so that an even smooth surface may be formed on the tapered portion of the valve, one hand of the operator being used in such case for turning the crank 'l0 and the other' for turning the wheel 50.

While two forms of tool holders are shown and described, one for the cutting operation and the other for the grinding operation. it is possible to use the same tool holder for both operations. by providing the cutting tool holder 28 with the longitudinal bore for the shaft 87, as the rack 42 will not in any way interfere with the operation of the screw 80, but when used as a cutter, it is necessary to remove the pinion 44 and hand wheel 50 so that the screw 8O may be inserted in the extension for moving the tool holder 28. Of course the greater convenience may be afforded by providing two separate tool holders, each holder properly equipped with its respective turning or grinding elements, for in such case, when the cover of the extension is removed, either form of holder may be quickly inserted inposition in the tool holding extension and it will not be necessary to wholly or partially disa sseinblc either of theseunits for making up a comA plete working unit for the other operation.

It should be understood that in the event of the valves 19 being provided with integral or non-detachable stems, the valves may b f as readily cut and ground in my machine s otherwise, for the stems in such case may be inserted in the bearings 2 and 8, and the crank 10 may be placed on the valve stems tating the valve and stem, an adjustable cen-- tering pin supported in said extension for centering the valve in operating position, means for maintaining a resilient engagement between said valve and pin, a tool post rigidly held on said base, a tool holder movably disposed in said post for regulating the engagement of the cutting tool with the valve, and means for moving said tool holder, as set forth.

2. A valve finishing machine comprising a base provided With bearings for rotatably supporting the valve stem, resiliently acting means for centering and limiting the thrust oi" the stem in said bearings, a tool holder movably disposed at an angle relative to the axis of said valve stem, an elongated screw niovably supported on said base and having a collar engaging a groove in said holder for moving the holder therewith relative to said basej and means attachable to said valve stem rotating the valve during the iinishing operation.

3. A. valve iinishing machine comprising a base having integrally formed valve stem bearings and tool holder' support for supporting said elements in diverging planes, a.

valve stem adapted to receive a valve rotatably held in said bearings, an extension on said base alined with said bearings and provided 'with mean for adjustably engaging the end oil.: said. valve stem, means on said `valve stein intermediate of said valve and the adjacent bearing for holding said valve stem in engagement with said adjnstable holding means, a tool holder adjustably supported on said base for engagement with said 'valve7 means for moving said tool holder in its support, a cutting tool held on the end of said tool holder, and means for rotating' said valve.

el. A 4valve finishing machine comprising an integral valve and tool holder support, a rotatably mounted valve stem on said support adapted to receive a valve, said tool holder being supported 'for longitudinal movement5 means for moving the tool holder relative to the valve, and a cutting tool supported on said tool holder.

FREDERIC C. WILLIAMS.

Witnesses lV. T. RYAN, JOHN B. WINDROP. 

